The Liebherr LTM 1090-4.1 Mobile Crane earns its keep on sites where you need serious lifting with decent road mobility, so knowing exactly where each component sits matters when you’re burning billable hours. The BMK / component identification manual is what techs grab when a fault code or wiring tag doesn’t tell them where the actual part is hiding. In a workshop, that’s the difference between a 20‑minute find and half a day stripping covers for nothing. This Technical Information & BMK Components Manual for SN 061996 is aimed squarely at that problem.
What this manual helps you do
- Identify which physical component matches a reference like K15, E1, or X45 on your wiring or hydraulic diagrams.
- Locate electrical boxes, valves, sensors, relays, and control units on both carrier and superstructure using layout views.
- Trace harness runs and major hydraulic lines across the crane by following the BMK reference designators.
- Cross-reference component IDs against other Liebherr documents so you can jump to the right schematic or service section.
- Pinpoint exactly where a suspect component lives before you roll a service truck or start pulling panels.
Who this is for
This suits a workshop technician, field service tech, electrical diagnostic engineer, fleet mechanic, or training instructor who already has or plans to use wiring diagrams and service info. If you’re after repair procedures, torque specs, or spare part numbers, you need a service manual and parts catalogue instead.
FAQ
Q: Is the PDF clear and searchable?
A: Yes, this kind of BMK PDF is typically text-searchable and the component diagrams are meant to be read on-screen or printed in the shop.
Q: Does it cover both carrier and superstructure?
A: Yes, it combines the BMK component identification for the carrier and the superstructure into one Technical Information package for this crane.
Q: Does it work with other Liebherr manuals?
A: Yes, the BMK reference designators are used to tie into Liebherr wiring diagrams, hydraulic schematics, and parts catalogues for the same machine.
Bottom line: If you need component identification and locations on a Liebherr LTM 1090-4.1, this BMK manual is the right tool; if you want how-to repair steps or part numbers, it’s not.
📘 Show Index
Table of Contents:
Carrier — Table of Contents
- Chassis_1090-4.1_ab_061794
- Vehicle:
- View from front, lighting and mirrors
- View from rear, lighting
- Support control unit, side marker lights, right
- Support control unit, side marker lights, left
- Cab:
- Interior lighting, doors
- Ventilation and heat exchangers
- Operating elements
- Centre console – main switch, batteries, fuses, transformer
- Centre console – I/O modules and diagnostic connector
- Centre console – instrumentation module, Intarder ECU
- Centre console – relays
- Centre console – fuses
- Pressurized air system:
- Pressure sensors and valves in brake system
- Compressor and dryer
- Auxiliary load valve block
- Four channel ABV drive unit
- Diesel engine D 846 TI A7, 370 kW/503 PS (Common Rail)
- Left side view of engine
- Right side view of engine
- View of engine from flywheel side
- Top view of engine
- Injectors
- Fuel pumps
- Fuel Service Center FSC
- Rail pressure sensor
- Pressure limiting valve in fuel system
- Banjo bolts for limiting pressure in fuel system
- Speed sensor
- Charge air sensor
- Oil pressure sensor
- Water-cooled external exhaust gas return
- flame starting device
- Coolant level and temperature
- Engine control unit, air filter pressure
- Diesel fuel system
- Fuel prefilter and fuel tank
- Automatic shift transmission ZF 12 AS 2302 with Intarder:
- Clutch and transmission actuators
- Intarder
- Hydraulic pumps:
- Pumps, fan drive and cooling system
- Power train:
- Overview
- Transfer gearbox VG 2600 – contact switch and speed sensor
- Transfer gearbox – road/off-road switchover
- Contact switch on axle 1 and 2
- Contact switch on axle 3 and 4
- Wheel rotation sensors
- Retarder Telma Focal F 2200*
- Steering:
- Steering pumps and steering from superstructure
- Steering gear
- Fault monitoring, pressure/ emergency supply
- Active rear axle steering:
- Angle sensor
- I / O modules and resistor modules in the support operating units
- Hydraulic pumps rear axle steering axles 3, 4
- Bosch CAN valves, axles 3 and 4
- Valve block axle 3 and 4
- Support:
- Supporting valves left
- Supporting valves right
- Inclination sensor
- Supporting force display pressure sensor
- Axle suspension:
- Axles suspension feedback
- Filling and draining valves, left
- Filling and draining valves, right
- Special equipment:
- Battery charger
- External power supply 230V
- Navigation equipment*/ Navigation equipment* with reversing camera*
- Auxiliary heating
- Index Chassis
- Symbole
- – Engine oil
- – Fuel
- Fine filter…
- Fuel tank…
- Manual delivery pump…
- Suction filter…
- – Pumps
- Centring circuit…
- Emergency steering pump…
- Steering circuit 1…
- Steering circuit 2…
- A
- A1…
- A5…
- A9…
- A10…
- A11…
- A12…
- A13…
- A14…
- A15…
- A60…
- A61…
- A62…
- A68_B1…
- A68_Y1…
- A68_Y2…
- A69…
- A71…
- A77*…
- A100…
- A103…
- A103_4…
- A103_7…
- A104…
- A112…
- A130…
- A131…
- A145…
- A150_E…
- A150_M1…
- A150_M2…
- A151_E…
- A151_M1…
- A151_M2…
- A700…
- A700_X1…
- A700_X2…
- AF0…
- AF1…
- AF2…
- AF3…
- AF4…
- AF5…
- AF6…
- AF7…
- AF8…
- AF9…
- AF24…
- AF24_F1…
- AF24_F2…
- B
- B5…
- B6…
- B7…
- B8…
- B9…
- B11*…
- B12*…
- B13*…
- B14*…
- B28…
- B29…
- B30…
- B31…
- B39…
- B50…
- B51…
- B52…
- B70…
- B100…
- B141…
- B142…
- B143…
- B144…
- B701…
- B702…
- B703…
- B704…
- B707…
- B708…
- B711…
- B713…
- E
- E1…
- E2…
- E3…
- E4…
- E5…
- E6…
- E11…
- E12…
- E20…
- E21…
- E22…
- E25…
- E26…
- E27…
- E28…
- E40…
- E41…
- E50…
- E51…
- E60…
- E61…
- E62…
- E63…
- E64…
- E75…
- E80…
- E81…
- E82…
- E83…
- E84…
- E95…
- Engine oil
- E100…
- E101…
- E102…
- E103…
- E128_E1…
- E128_E2…
- E128_E3…
- E128_E4…
- E128_E5/E6…
- E128_E7…
- E128_E8…
- E129_E1…
- E129_E2…
- E129_E3…
- E129_E4…
- E129_E5/E6…
- E129_E7…
- E129_E8…
- E200…
- E204…
- E230…
- E231…
- E232…
- F
- G
- H
- K
- K40…
- K41*…
- K49…
- K56…
- K76*…
- K77*…
- K78*…
- K79*…
- L
- M
- M2…
- M9…
- M10…
- M11…
- M12…
- M19…
- M20…
- M21…
- M700…
- MP 1…
- MP 2…
- MP 5…
- MP 7…
- MP 8…
- MP11…
- MP16…
- MP19/20…
- N
- P
- R
- S
- S1…
- S4…
- S5…
- S12…
- S13…
- S14…
- S15…
- S16…
- S17…
- S18…
- S19…
- S22…
- S23…
- S30…
- S31…
- S33…
- S41…
- S42…
- S43…
- S44…
- S50…
- S51…
- S60…
- S61…
- S62…
- S63…
- S64…
- S65…
- S89…
- S90…
- S114…
- S116…
- S118…
- S119…
- S159*…
- S191…
- U
- X
- X29…
- X44…
- X45…
- X56…
- X64…
- X65…
- X90…
- X91…
- X92…
- X93…
- Y
- Y5…
- Y9a…
- Y9b…
- Y10…
- Y11…
- Y12…
- Y13…
- Y16…
- Y17…
- Y18…
- Y19…
- Y20…
- Y24…
- Y25…
- Y40…
- Y41…
- Y41 to Y44…
- Y42…
- Y43…
- Y44…
- Y49…
- Y50…
- Y51*…
- Y52…
- Y53…
- Y64…
- Y65…
- Y66…
- Y80a…
- Y80b…
- Y81a…
- Y81b…
- Y82a…
- Y82b…
- Y83a…
- Y83b…
- Y84a…
- Y84b…
- Y85a…
- Y85b…
- Y86a…
- Y86b…
- Y87a…
- Y87b…
- Y102a…
- Y102b…
- Y107…
- Y108…
- Y109…
- Y220…
- Y221…
- Y222…
- Y225…
- Y226…
- Y231…
- Y232…
- Y702…
- Y703…
- Y711…
- Y712…
- Y713…
- Y714…
- Y715…
- Y716…
Superstructure — Table of Contents
- Superstructure_1090-4.1_ab_061794
- Cab instruments:
- Liccon monitor, pedals
- Left master switch
- Right master switch
- Roof console
- Crane cab:
- Wiper system, radio system
- Heating, auxiliary heater
- Auxiliary heating
- Switch box:
- Slewing frame – fuses
- Slewing frame – relays
- CAN and LSB subscribers
- EMERGENCY OPERATION without LICCON system – X emerg. connector
- EMERGENCY OPERATION without LICCON system – Operation
- EMERGENCY OPERATION without LICCON system – Resistors
- Terminals, voltage converters
- Electric slewing platform:
- Diesel engine D 934 S TI A6, 145 kW/197 PS (PLD)
- Right side view of engine
- Plug-in pumps
- Fuel temperature sensor
- Fuel preliminary filter unit
- Left side view of engine
- Coolant temperature
- Top view of engine
- Frontal view of engine
- Speed sensor
- Oil pressure sensor
- Right installation view
- Radiator fan drive, air filter pressure
- Engine control unit LH ECU UP/CR
- Charge air and coolant temperature sensor
- Charge air pressure sensor
- Ventilation flap in intake air (optional)
- Cooling water level sensor
- Fuel tank and tank sensor
- Pressurized air system:
- Air dryer, cab platform
- Turntable locking mechanism, boom direction
- Hydraulic turntable:
- Hydraulic pump overview
- Hydraulic component overview
- Measuring connection plate overview
- Main control block with one hoist gear
- Main control block with hoist gear 2
- Main control block-pressure staging valves and pressure sensor
- Temperature sensor hydraulic oil
- Winch 1 and 2 – incremental sensor
- Winch 1 and 2 – brake actuation
- Auxiliary load
- Slewing gear – actuation, slewing angle indicator
- Slewing gear – brake
- Luffing gear
- Ballasting
- Turntable, general:
- Lighting turntable
- Central lubrication system
- Telescopic boom:
- Cable drums, angle and length sensors
- Boom head
- Tele pinning
- Tong pinning
- Hydraulic folding jib:
- Actuation
- Right angle sensor and limit switch 59
- Hydraulic components
- Special equipment:
- Dolly (trailer for boom transport, USA)
- Air conditioning system
- Index Superstructure
- Symbole
- – Engine oil
- Dipstick..
- Filter..
- Pump..
- – Fuel
- Delivery pump..
- Fine filter..
- Manual pump..
- Preliminary filter unit..
- – Pumps
- Pump 1..
- Pump 2..
- Pump 3..
- Pump 4..
- A
- A1..
- A2..
- A14..
- A15..
- A50..
- A417..
- A750..
- A750_X1..
- A750_X2..
- AF1..
- AF2..
- AF3..
- AF4..
- AF5..
- AF6..
- AF7..
- AF8..
- AF9..
- AF11..
- AF25..
- B
- B1..
- B2..
- B4..
- B6..
- B7..
- B17*..
- B19..
- B25..
- B26..
- B27..
- B28..
- B29..
- B30..
- B37..
- B38..
- B55..
- B62..
- B701..
- B703..
- B707..
- B708..
- B709..
- B710..
- B711..
- B712..
- B713..
- E
- E6..
- E7..
- E8*..
- E11..
- E12..
- E17..
- E18..
- E60..
- E96..
- Engine oil
- dipstick..
- filter..
- pump..
- E700X272..
- EP0..
- EP1..
- EP2..
- F
- F61..
- F62..
- F63..
- Fuel
- delivery pump..
- fine filter..
- preliminary filter unit..
- G
- H
- H21..
- H80..
- H95..
- H101..
- H102..
- H105..
- H106..
- H423..
- H616..
- H619..
- H633..
- H634..
- H660..
- K
- K1..
- K2..
- K11..
- K12..
- K13..
- K14..
- K15..
- K16..
- K17..
- K18..
- K19..
- K20..
- K21..
- K22..
- K23..
- K24..
- K25..
- K26..
- K27..
- K28..
- K29..
- K30..
- K31..
- K32..
- K33..
- K34..
- K35..
- K36..
- K37..
- K38..
- K39..
- K40..
- K41..
- K42..
- K51..
- K52..
- K53..
- K54..
- K55..
- K56..
- K57..
- K58..
- K59..
- K61..
- K62..
- K651..
- K652..
- M
- M2..
- M3..
- M4..
- M6..
- M7..
- M9..
- M13..
- M23..
- Manual
- M750..
- MP 1..
- MP 2..
- MP 3..
- MP 4..
- MP 5..
- MP 6..
- MP 7..
- MP 8..
- MP 9..
- MP 10..
- N
- P
- P2..
- P3..
- P12..
- P655..
- P656..
- R
- R4..
- R9..
- R50..
- R51..
- R52..
- R53..
- R59..
- S
- S1..
- S26..
- S27..
- S28..
- S29..
- S30..
- S32..
- S34..
- S35..
- S49..
- S50..
- S69..
- S72..
- S73..
- S77..
- S78..
- S81..
- S83..
- S84*..
- S89..
- S90..
- S103..
- S104..
- S301..
- S320..
- S321..
- S322..
- S323..
- S324..
- S325..
- S326..
- S327..
- S328..
- S401..
- S413..
- S420..
- S421..
- S424..
- S425..
- S427..
- S428..
- S602..
- S604..
- S606..
- S608..
- S610..
- S612..
- S614..
- S618..
- S624..
- S626..
- S628..
- S632..
- S636..
- S638..
- S640..
- S642..
- S644..
- S646..
- S648..
- S650..
- S652..
- S654..
- S901..
- S902..
- S903..
- S904..
- S905..
- S908..
- S912..
- S913..
- S914..
- S915..
- S918..
- S919..
- S930..
- S931..
- S940..
- T
- X
- X1..
- X2..
- X3..
- X4..
- X5..
- X6..
- X7..
- X8..
- X9..
- X10..
- X11..
- X12..
- X13..
- X14..
- X15..
- X16..
- X17..
- X18..
- X19..
- X20..
- X21..
- X22..
- X23..
- X24..
- X25..
- X26..
- X27..
- X28..
- X29..
- X30..
- X31..
- X32..
- X33..
- X34..
- X35..
- X36..
- X37..
- X38..
- X39..
- X40..
- X49..
- X50..
- X51..
- X52..
- X53..
- X54..
- X55..
- X56..
- X57..
- X107..
- X108..
- X205S31..
- X268..
- X269..
- X298..
- X417..
- X501..
- X519..
- X5B11..
- X5B12..
- XMLSB2..
- XNOT..
- Y
- Y1a..
- Y1b..
- Y3..
- Y4a..
- Y4b..
- Y5..
- Y6a..
- Y6b..
- Y10..
- Y11..
- Y12..
- Y17a..
- Y17b..
- Y18..
- Y19a..
- Y19b..
- Y20..
- Y21..
- Y22..
- Y23..
- Y27..
- Y28..
- Y31..
- Y32..
- Y38..
- Y40..
- Y49..
- Y56..
- Y58..
- Y66..
- Y67..
- Y69..
- Y80a..
- Y80b..
- Y82..
- Y85a..
- Y85b..
- Y103a..
- Y103b..
- Y109..
- Y137..
- Y139..
- Y141..
- Y142..
- Y711..
- Y712..
- Y713..
- Y714..
Liebherr Crane
